[Voyage-linux] ALIX clock drift

daniel wilson (spam-protected)
Sat Jun 11 05:15:32 HKT 2011


Jordi,

Thank you for your reply.  Yes please, I'd appreciate a copy of your
patch, just out of interest.

It sounds like clocksource=tsc is the fix to all of this though.  I'll
try it next week and report back.

Cheers,

Dan



On 10 June 2011 11:00, Jordi Ferrer Plana <jferrerp at eia.udg.edu> wrote:
> I tried 512 and 1024 tick and it didn't work for me (if you want I can send
> you a patch that you apply to the voyage-2.6.32 kernel).
>
> I've experienced that if you do not activate the serial console (DO NOT use
> console=ttyS0,38400n8 as kernel boot option) the drift is quite
> acceptable (2 secs/hour) but I you activate the serial console it is horrible
> because somehow the system falls back from tsc to jiffies clock source. You
> could force tsc using clocksource=tsc as kernel parameter and keep using
> console with the quite acceptable drift (as far as I remember).
>




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